Cargo Carriage: This convenient carriage assembly attaches to your Alpha Cargo rear rack to keep young riders secure on the rear cargo platform seat. Constructed from powder coated aluminum for long lasting durability in all conditions Can be used with 2 seat pads and 1 support bar/backrest The Carriage is only compatible with the Alpha Cargo and Higgs Cargo Dimensions: 22.75 x 19.5 x 10 inches